Azf20/firehose and substreams (#230)

* brief intros

* tweak firehose wording

Author: azf20

pages/en/firehose.mdx

@@ -1,11 +1,11 @@
 ---
-title: The Firehose
+title: Firehose
 ---
 
-The Firehose provides a files-based and streaming-first approach to processing blockchain data.
+Firehose provides a files-based and streaming-first approach to processing blockchain data.
 
 Firehose integrations have been built for Ethereum (and many EVM chains), NEAR, Solana, Cosmos and Arweave, with more in the works.
 
-The Firehose integrates with Graph Node to power performant and scaleable indexing across multiple chains, and powers [substreams](/substreams), a new transformation technology built by The Graph core developers.
+Graph Node integrations have been built for multiple chains, so subgraphs can stream data from a Firehose to power performant and scaleable indexing. Firehose also powers [substreams](/substreams), a new transformation technology built by The Graph core developers.
 
 Visit the [firehose documentation](https://firehose.streamingfast.io/) to learn more.